function getCookie (name) {
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg) return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break;
    }
    return null;
}

function setCookie(name, value, expires, path, domain, secure){
    var today = new Date();
    var expiry = new Date(today.getTime() + 24 * 60 * 60 * 1000);
    if(expires==''||expires==null) {
        expires=expiry;
    }
    var curCookie = name + "=" + encodeURIComponent(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
    document.cookie = curCookie;
}

function delCookie(name) {
    expdate = new Date();
    expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
    setCookie(name, "", "", "/", "", "");
}
var expdate= new Date();

function getCookieVal (offset) {
    var endstr = document.cookie.indexOf (";", offset);
    if (endstr == -1) endstr = document.cookie.length;
    return decodeURIComponent(document.cookie.substring(offset, endstr));
}
